import 'dart:async';

import 'package:enjoy_plus_community/utils/eventbus.dart';
import 'package:enjoy_plus_community/utils/http.dart';
import 'package:enjoy_plus_community/utils/token.dart';
import 'package:enjoy_plus_community/utils/toast.dart';
import 'package:flutter/material.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({super.key});

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  int _countdown = 60;
  bool _isCounting = false;
  Timer? _timer;

  // 定义两个控制器用于获取输入框的内容
  final TextEditingController _phoneController = TextEditingController();
  final TextEditingController _codeController = TextEditingController();

  void _startCount() {
    if (_isCounting) return;
    _isCounting = true;
    _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
      if (_countdown > 0) {
        setState(() {
          _countdown--;
        });
      } else {
        setState(() {
          _isCounting = false;
        });
        _countdown = 60;
        _timer!.cancel();
      }
    });
  }

  void _getCode() async {
    final mobile = _phoneController.text;
    if (mobile.isEmpty) return ToastUtil.showError('请输入手机号');
    RegExp reg = RegExp(r'^1[3-9]\d{9}$');
    if (!reg.hasMatch(mobile)) return ToastUtil.showError('请输入正确的手机号');
    var res = await http.get('/code', params: {'mobile': mobile});
    if (res['code'] != 10000) return ToastUtil.showError('获取验证码失败');
    ToastUtil.showSuccess('验证码已发送');
    _codeController.text = res['data']['code'];
    _startCount();
  }

  void _submit() async {
    // 3.1 校验手机号
    if (_phoneController.text.isEmpty) {
      return ToastUtil.showError('请输入手机号码');
    }

    RegExp regExp = RegExp(r'^1[3-9]\d{9}$');
    if (!regExp.hasMatch(_phoneController.text)) {
      return ToastUtil.showError('请输入正确的手机号码');
    }

    // 3.2 校验验证码
    if (_codeController.text.isEmpty) {
      return ToastUtil.showError('请输入验证码');
    }
    if (_codeController.text.length != 6) {
      return ToastUtil.showError('请输入6位验证码');
    }
    RegExp regExp2 = RegExp(r'^\d{6}$');
    if (!regExp2.hasMatch(_codeController.text)) {
      return ToastUtil.showError('请输入6位验证码');
    }

    // 3.3 调用登录接口
    var res = await http.post(
      '/login',
      data: {'mobile': _phoneController.text, 'code': _codeController.text},
    );
    if (res['code'] != 10000) return ToastUtil.showError('登录失败');

    // 3.4 存储token
    await TokenManager().saveToken(res['data']['token']);
    ToastUtil.showSuccess('登录成功');

    // 注意清除定时器
    if (_timer != null) {
      _timer!.cancel();
    }

    // 通知我的页刷新数据
    eventBus.fire(RefreshMine());

    // 3.5 返回到上一页
    Navigator.pop(context);
  }

  @override
  void dispose() {
    if (_timer != null) {
      _timer!.cancel();
    }
    _phoneController.dispose();
    _codeController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        title: const Text('登录'),
        backgroundColor: Colors.transparent,
        centerTitle: true,
      ),
      body: Container(
        padding: const EdgeInsets.all(20),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: [
            const Row(
              children: [
                Text(
                  '登录',
                  style: TextStyle(fontSize: 25, fontWeight: FontWeight.bold),
                ),
              ],
            ),
            const SizedBox(height: 10),
            const Row(
              children: [Text('加入享+, 让生活更轻松', style: TextStyle(fontSize: 15))],
            ),
            const SizedBox(height: 30),
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                Expanded(
                  child: TextField(
                    controller: _phoneController,
                    keyboardType: TextInputType.phone,
                    maxLength: 11,
                    decoration: InputDecoration(
                      labelText: '手机号',
                      hintText: '请输入手机号',
                    ),
                  ),
                ),
                ElevatedButton(
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.white,
                    shadowColor: Colors.transparent,
                    foregroundColor: const Color.fromARGB(255, 85, 145, 175),
                    minimumSize: const Size(100, 50),
                  ),
                  onPressed: () {
                    _getCode();
                  },
                  child: _isCounting
                      ? Text(
                          '$_countdown s后重新获取',
                          style: const TextStyle(color: Colors.grey),
                        )
                      : Text('获取验证码'),
                ),
              ],
            ),
            const SizedBox(height: 8),
            TextField(
              controller: _codeController,
              keyboardType: TextInputType.number,
              maxLength: 6,
              decoration: InputDecoration(
                labelText: '验证码',
                hintText: '请输入6位验证码',
              ),
            ),
            const SizedBox(height: 8),
            const Row(
              children: [
                Text(
                  '未注册手机号经验证后将自动登录',
                  style: TextStyle(fontSize: 12, color: Colors.grey),
                ),
              ],
            ),
            const SizedBox(height: 50),
            Row(
              children: [
                Expanded(
                  child: ElevatedButton(
                    style: ElevatedButton.styleFrom(
                      backgroundColor: const Color.fromARGB(255, 85, 145, 175),
                      minimumSize: const Size(100, 50),
                    ),
                    onPressed: () {
                      _submit();
                    },
                    child: const Text(
                      '登录',
                      style: TextStyle(color: Colors.white, fontSize: 20),
                    ),
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}
